Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 221 | Orell | English | Ore hill. Both a surname and a place name. | M | |
| 222 | Orell | Russian | Eagle. | M | |
| 223 | Orell | Slavic | Eagle. | M | |
| 224 | Oren | Gaelic | Pale. | M | |
| 225 | Oren | Hebrew | Pine tree. | M | |
| 226 | Oreste | Greek | From the mountain. | M | |
| 227 | Orestes | Greek | From the mountain. | M | |
| 228 | Orford | English | From the cattle ford. | M | |
| 229 | Orham | English | From tbe riverbank enclosure. | M | |
| 230 | Ori | Hebrew | My light. | M | |
| 231 | Orick | English | From the ancient oak tree. | M | |
| 232 | Oriel | Russian | Eagle. | M | |
| 233 | Oriel | Slavic | Eagle. | M | |
| 234 | Orik | English | From the ancient oak tree. | M | |
| 235 | Orin | Celtic | White. | M | |
| 236 | Orin | Gaelic | Pale. | M | |
| 237 | Orin | Hebrew | Tree. | M | |
| 238 | Orion | Greek | Rising in the sky; dawning. Mythological Orion was a mighty hunter and son of Poseidon. The constellation Orion contains three conspicuous stars. | M | |
| 239 | Oris | Hebrew | Tree. | M | |
| 240 | OrIyg | Norse | Son of Valthjof. | M | |